TW200424672A - Wide view angle liquid crystal display - Google Patents

Abstract

A wide view angle liquid crystal display comprises a back light unit, an optically compensation circular polarizer unit, an LC panel and an optically compensation circular analyzer unit is provided. The optically compensation circular polarizer unit is disposed above the back light unit. The LC panel is disposed above the optically compensation circular polarizer unit. The optically compensation circular analyzer unit is disposed above the LC panel. Due to a light with circular polarization being provided to the LC panel so that the uniformity of the viewing angle and the contrast ratio are enhanced as well the gray level inversion at a large viewing angle is prevented.

Description

200424672

V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a wide-viewing fast-response liquid crystal display, and in particular, to a wide-viewing device using a circularly polarized aurora, an I-crystal display. Lianlian reaction fluid [Prior technology] For the rapid progress of the multimedia society, most of them have benefited from the rapid progress of semi-, or human-machine display devices. As far as monitors go, the Cathode Ray Tube (CRT) has been dominating the display market in recent years because of its excellent display economy. However, the quality of the environment in which most terminals / display β devices are operated on the table is cut from the perspective of environmental protection. If it is predicted from the trend of energy conservation, the cathode radiation, space consumption and energy consumption are still There are many problems, and the requirements for thin, short, small, and low power consumption cannot provide a solution. Therefore, thin film transistor liquid crystal displays (Th in F i 1 m Transistor Liquid Crystal Display, TFT LCD) with superior characteristics such as high picture quality, increased space utilization efficiency, low power consumption rate, and no radiation have gradually become the market. Mainstream. Figure 1 shows the structure of a conventional wide-view fast-response liquid crystal display. Please refer to FIG. 1. The conventional wide-view fast-response liquid crystal display 100 is mainly composed of a backlight 10, a linear polarizer 104, a compensation film 106, and 111. An optical self-compensating birefringent liquid crystal panel (OCB-LCD) 108 and a linear analyzer (linear

3 | (&7; 7twf.ptd page 5 200424672 V. Description of the invention (2) a n a 1 y z e r) 1 1 2 Among them, the linear polarizer 1 04 is arranged above the backlight source 102, the optical self-compensating birefringent liquid crystal panel 10 08 is arranged above the linear polarizer 104, and the linear analyzer 1 1 2 It is disposed above the optical self-compensating birefringent liquid crystal panel 108. In addition, the compensation film 1 06 is disposed between the linear polarizer 104 and the optical self-compensating birefringent liquid crystal panel 1 08, and the compensation film 1 10 is disposed between the optical self-compensating birefringent liquid crystal panel 1 Between 0 8 and linear analyzer 1 1 2. Please also refer to Fig. 1. The optical self-compensating birefringent liquid crystal panel 108 has extremely fast response speed, but it is necessary to use appropriate optical compensation to achieve the purpose of wide viewing angle. In the conventional technology, linear polarizers 104 and linear polarizers 1 12 are used in combination with two compensation films 1 06 and 1 10 to achieve the purpose of viewing angle compensation. Generally, wide-angle viewing films produced by Fuji are used. (Wideviewfi 1 m) to compensate the viewing angle, so that although good viewing angle characteristics can be obtained, the LCD panel will be directly limited by the specifications of the wide viewing angle film during design. It is known that another way of viewing angle compensation is to use a dual optical axis (bia X ia 1) material as the compensation film 1 06, 1 10 and a multi-gap ^ tk if, so as to eliminate large The gray level of the viewing angle is inverted (gray 1 eve 1 inversi ο η), but the design of multiple liquid crystal gaps increases the difficulty of the LCD panel in the manufacturing process. In addition, because the conventional technology uses linear polarizers and linear analyzers, the viewing angle appears asymmetric in different directions. [Summary of the Invention] Therefore, an object of the present invention is to provide a wide-viewing-angle fast-response liquid crystal display without compensating the viewing angle of the liquid crystal panel without using a wide-viewing film.

: .1-O # 57twf. Ptd Page 6 2 | 00424672 V. Explanation of the invention (3) The design parameters of the LCD panel will not be limited by the wide viewing angle film. Another object of the present invention is to provide a wide-view fast-response liquid crystal display, which can not only eliminate the phenomenon of gray-scale inversion at large viewing angles, but also can avoid the complicated fabrication of multiple liquid crystal gaps. Another object of the present invention is to provide a wide-viewing-angle fast-response liquid crystal display to improve the phenomenon that the viewing angle is asymmetric in different directions. To achieve the above object, the present invention proposes a wide-viewing-angle fast-response liquid crystal display, which is mainly composed of a backlight source, an optically-compensated circular polarizing member, a liquid crystal panel, and an optically-compensated circular analyzer. Among them, the optically-compensated circular polarizing member is disposed above the backlight, the liquid crystal panel is disposed above the optically-compensated circular polarizing member, and the optically-compensated circular polarization detecting member is disposed above the liquid crystal panel. The invention uses circularly polarized aurora to operate, so as to improve the viewing angle uniformity and contrast of a liquid crystal display with a wide viewing angle and fast response, while avoiding the problem of large viewing angle grayscale inversion. In a preferred embodiment of the present invention, the liquid crystal panel is, for example, an optical self-compensating birefringent liquid crystal panel. In a preferred embodiment of the present invention, the optically-compensated circularly polarizing member is composed of, for example, a polarizer and a first dual optical axis compensation film disposed between the polarizer and the liquid crystal panel. Wherein, the first dual optical axis compensation film has major axis refractive indexes nx, ny, and nz, and each of the refractive indexes nx, ny, and nz satisfies the following formulas nx > ny > nz, 4 > (nx-nz) / (nx-ny ) > 2 made by Pgen, and the main vehicle has a main axis with a refractive index η X, for example, an angle of < 9 3 with the alignment direction of the above-mentioned LCD panel, and this angle 0 3 is, for example, between 40 degrees and 7 Between 5 degrees. With the above optical supplement

5lM57twf.ptd Page 7 200424672 V. Description of the invention (4) The optically-compensated circular deflection member with a rounded polarizer (a combination of a polarizer and the first dual optical axis compensation film) is, for example, an analyzer, A second single optical axis quarter-wave plate and a second double optical axis compensation film are formed. The absorption axis of the polarizer is, for example, perpendicular to the absorption axis of the polarizer, and the alignment direction of the polarizer and the liquid crystal panel is at an angle of 0 4, and the angle / 9 4 is, for example, between 40 degrees and 7 Between 5 degrees. The second single optical axis quarter wave plate is disposed between the analyzer and the liquid crystal panel, and the optical axis direction of the second single optical axis quarter wave plate and the absorption axis direction of the analyzer are, for example, 4 5 degrees. The second dual optical axis compensation film is disposed between the second single optical axis quarter-wave plate and the liquid crystal panel, and the second dual optical axis compensation film has a main axis refractive index η X ', ny', nz ', And nx ,, ny ', and nz' satisfy the limitation of the following formula nx '> ny, > nz', (nx'-nz,) / (nx '-ny') > 6, and the principal axis refractive index is nx The main axis is, for example, perpendicular to the alignment direction of the liquid crystal panel. In a preferred embodiment of the present invention, the optically-compensated circularly polarizing member is composed of, for example, a polarizer, a first single optical axis quarter wave plate, and a first dual optical axis compensation film. The first single-optical-axis quarter-wave plate is, for example, disposed between the polarizer and the liquid crystal panel, and the optical-axis direction of the first single-optical-axis quarter-wave plate is, for example, the absorption axis of the polarizer. Direction clip 45 degrees. The first dual optical axis compensation film is disposed between the first single optical axis quarter wave plate and the liquid crystal panel. Among them, the first dual optical axis compensation film has a major axis refractive index nx, ny, η ζ, and nx, ny, and nz satisfy the following formulas nx > ny > nz, (nx-nz) / (nx-ny) > 6 Limitation, and the main axis with the main axis refractive index nx is, for example, perpendicular to the alignment direction of the liquid crystal panel. And the above-mentioned optically compensated circular polarizing member (polarizing plate, a first single optical axis quarter wave plate, and a first double light

5 drama 57twf. Ptd page 8 200424672 V. Description of the invention (5) Combination of axis compensation film) The optical compensation circle analyzer is composed of, for example, an _ analyzer and a detector disposed between the analyzer and the LCD panel. It is composed of a second double-light sleeve compensation film. Wherein, the absorption axis of the polarizer is, for example, perpendicular to the absorption axis of the polarizer, and the alignment direction of the polarizer and the liquid crystal panel is offset by an angle θ 1, and the angle 0 1 is, for example, between 40 degrees and 7 Between 5 degrees. The second dual optical axis compensation film has major axis refractive indices nx ', ny', nz ', and nx', ny ', nz, ^ STSnx' > ny '> nz', 4 > (nx'-nz ') / (nx '~ riy, > 2), and the main axis with a refractive index of η x' and the alignment direction of the liquid crystal panel is at an angle 02, and this angle 02 is, for example, between 20 degrees and 50 degrees. If the polarized double light is a double light pole clip ~ two single and the fourth direction axis has four main bottles, the shaft is supplemented by the ~ angle of the suction angle of the light, the second single is folded, and the main shaft is folded. The preferred embodiment of the present invention In the optical compensation circle (a combination of a polarizer, a first single optical axis quarter-wave plate, and a first compensation film), an optical compensation circle analyzer can also be exemplified by a polarizer, a first · A morning light axis is composed of a quarter wave plate and a second compensation film. The absorption axis of the analyzer is perpendicular to the absorption axis, and the orientation of the polarizer and the liquid crystal panel is ^ 0 0 The angle 0 0 is, for example, between 40 degrees and 50 degrees. The fourth quarter wave plate is disposed between the analyzer and the liquid crystal panel, and the optical axis The optical axis direction of the half-wave plate is 45 degrees from the absorption axis of the analyzer. The first dual optical axis compensation film is disposed between the second single-light one-wave plate and the LCD panel, and the second dual optical axis Supplement the film and the emissivity nx,, ny,, ηζ, and nx,, ny,, ηζ, satisfy the following formula nx'hy '> ",, Ux'-nZ') / (nx, —ny,) > 6, the principal axis of the emissivity ηχ ′ is perpendicular to the alignment direction of the liquid crystal panel.

200424672 Description of the invention (6) In a preferred embodiment of the present invention, the sterol liquid crystal layer and a first round polarizer member such as Λ upper supplementary cholesterol liquid crystal layer and a first round polarizer Polar structure, .w = Learn to make up the polarized circular polarized member (赡 U ”compensation film. And the optically compensated circular polarized light with the ^,), crystal layer and the first two optical vehicles 22 single optical axis quarter One of the wave plates :: structure, for example, is made of -analyzer, to the direction ::: Among them, the absorption axis of the analyzer: "" constituted by the axis compensation film. . The angle 0 5 is, for example, the alignment direction of the liquid-passing day-to-day panel ^ optical axis ^ half-wave plate is set to 50 degrees. ZO ~ the light I 2 of the quarter-wave plate with a single optical axis, the quarter-η between the LCD panel and the -η 轴 :: axis compensation film is disposed between the ^ th main axis and the second pair Optical axis = Erguang Yu with a rate of ηχ ,,,,,, and the main axis of refraction car ηχ film has the orientation direction of the night / day panel. The main axis is perpendicular to the preferred embodiment of the invention. The optically compensated circularly polarized liquid crystal layer is the same as the above-mentioned optically compensated circularly polarized structure. ^ Is compensated by an analyzer and a second dual optical axis 骐 f deflection θ The absorption axis of the θ analyzer is, for example, aligned with the alignment of the liquid crystal panel ^. The interpolation / this angle Θ 6 is, for example, between 15 and 50 degrees. The flute ^ one-angle chess is arranged between the analyzer and the LCD panel. The second pair = = ^ has the main axis refractive index nx ,, ny, and nz, and the main axis refraction is first corrected ^ The sleeve is aligned with the LCD panel, for example Orientation clip-Bei Geng A 7 is nx, for example, between 20 and 50 degrees. … 7, this angle Θ7 Since the present invention uses circularly polarized aurora for operation,

200424672 V. Description of the invention (Ό Viewing angle quickly reflects the viewing angle of the liquid crystal display and the contrast, and at the same time can avoid the problem of large viewing angle grayscale inversion. In order to make the above and other objects, features and advantages of the present invention more obvious and easier Understand that several preferred embodiments are given below, and are described in detail in conjunction with the attached drawings: [Embodiment Mode] FIG. 2 is a schematic diagram showing a structure of a wide-view fast-response liquid crystal display according to the first embodiment of the present invention. Figure 3 shows the axial schematic diagram of each optical film in Figure 2. First, please refer to Figure 2. The wide viewing angle fast response liquid crystal display 2 of this embodiment is mainly composed of a backlight 2 0 2 , An optically-compensated circularly polarizing member 204, a liquid crystal panel 206, and an optically-compensated circularly polarizing member 208. Among them, the optically-compensated circularly polarizing member 204 is disposed in the backlight 20 Above 2, the liquid crystal panel 206 is, for example, a fast-responding optical self-compensating birefringent type liquid crystal panel (OCB-LCD), which is, for example, disposed above the optically-compensated circular polarizing member 204, and the optically-compensated circular analyzer Construct 2 0 8 is disposed above the liquid crystal panel 2 08. Please refer to FIG. 2 and FIG. 3 at the same time. The optically compensated circular polarizing member 2 0 4 of this embodiment is, for example, a polarizing plate 2 0 4 a, a The first single-optical-axis quarter-wave plate 204b and a first dual-optical-axis compensation film 204c are formed. The first single-optical-axis quarter-wave plate 2 0 4 b is, for example, disposed on the polarizer 2 Between the 0 4 a and the liquid crystal panel 206, and the optical axis direction of the first single optical axis quarter wave plate 204 b is, for example, 45 degrees from the absorption axis direction of the polarizer 2 0 4 a. The first double optical axis The compensation film 2 0 4 c is disposed between the first single optical axis quarter wave plate 2 0 4 b and the liquid crystal panel 2 06. In addition, the above-mentioned first dual optical axis compensation film 2 0 4 c is provided with

5OT57twf. Ptd Page 11 200424672 V. Description of Invention (8)

There are major axis refractive indices nx, ny, nz nx > ny > nz, (nx-nz) / (nx-nx's main axis is, for example, perpendicular to the liquid direction) 〇 and nx, ny, nz satisfy the following formula) > Restricted, and the refractive index of the major axis is the orientation direction of the panel 20 (rubbing, please also refer to Figure 2 and Figure 3, where μ, f Ψ and the compensation circular polarized member 2 04 (polarized sheet 2 n shell) In the example, "" ^ 1000 wave plate 2 0 4b and the first double optical axis insert j〇4a, the first single optical axis quarter is produced in 偬 m Γ, and the special patch film 2 04 c (Combination) The matching optical compensation unit 0 analysis member 208 is, for example, composed of a single optical analyzer 208a and a single optical analyzer. Among them, the absorption dual optical axis compensation film of the analyzer 208a 20 The closing axis is perpendicular to each other, and the polarizing plate 2 〇4 is at an angle 0 0 The second single light car is between the LCD panel 2 06, and the second _ axis direction and the detecting plate 2 0 8 a ^ 光 ^ The optical axis compensation film 2 0c of the quarter-wave plate 208b is arranged in the -f direction, for example, a clip of 45 degrees. The second and single optical-axis quarter-wave plate 208b and Double optical axis compensation film 2 0 8 c with spindle folding car by a quarter The wave plate 2 0 8 b and one and the closing axis are, for example, sucked with the polarizing plate 2 0 4 a ^ ^ ^ ^ a and the orientation direction of the liquid crystal panel 2 0 6 'this angle 0 0 例 σ & person ^ ea Bayi and j are between 40 degrees and 50 degrees. Four blades and wave plate 2 0 8 b are arranged between the analyzer 2 0 8 a and the liquid crystal panel 2 0 6 nx ', ny, and nz ▼, and ηχ, nx' > ny '> ηζ ,, (ηχ, -ηζ,) / (. The main axis of the emissivity ηχ' is perpendicular to the liquid crystal. The orientation of the ^ plate of the present invention, ^ 向 奴 ° # β library liquid crystal display structure, the axial view of the wide-angle fast-response diaphragm of the 1st embodiment of the embodiment; Figure?; U f5 is shown in Figure 4 Each of the optical angle-determining response liquid crystal displays 3 0 0 is mainly composed of = backlight source 302, an optical and ny, X9 ~ η z 'Meet the following formula ny,) > 6 and the main axis is folded

200424672 V. Description of the invention (9) 'Compensated circular polarizing member 304, a liquid crystal panel 306, and _ optical compensation circular polarizing member 308, and the arrangement of each component is the same as ^ Shi Huan, Therefore, I will not repeat them here. ", When referring to Fig. 4 and Fig. 5", the optically-compensated circular polarizing member 3 0 4 of this embodiment is, for example, a polarizing plate 3 0 4a, and a first-single optical axis quarter wave plate 3 0 4b and a first dual optical axis compensation film 304c. Straight, ί :: = quarter: one wave plate 3 'is, for example, arranged in a polarizer and Ϊ = ΓΛJV and the first single optical axis quarter-wave plate 3 04b has an optical axis direction such as The sound of the pole piece 304a is clamped 4 times in the absorption axis direction. Flute a 雔 axis compensation film 30 4. Then it is arranged between the first single optical axis quarter and ": = ^ panel 3 06". In addition, the above-mentioned first dual optical axis patch film 30 ° and the main axis refractive index nx, ny, nz, And ηχ, ny, and ^ satisfy the following formula: nx ny ηζ '(ηχ-ηζ) / (ηχ_ηγ) > Η 9 Limits the axis 1 of the main axis gx if it is perpendicular to the orientation of the liquid crystal panel 306, direction). Please also refer to FIG. 4 and FIG. 5. In this implementation, the circular polarizing member 3 0 4 (polarizing piece 3004a, the first single, the middle eight, and the first thousand Shibuya; 304h to the other virtue, Le earlier axis The quarter-wave plate circular analysis member 308 is also a combination of the optical axis compensation film 304C) with the optical compensation plate 3 0 8 a disk, 1 such as an analysis plate 3 0 8 a and a configuration In the analysis I, the second double optical axis compensation film 3 0 8 b between the two ΐΪ 3 0 8 is oriented in the direction of each other ^ straight piece 30 and the absorption axis is, for example, the absorption axis of the polarizing piece 3 0 4a One corner is the second between the polarizer sheet 304a and the alignment of the liquid crystal panel 3 06. This angle 0 1 is, for example, a brother between 40 degrees and 75 degrees, and the axis compensation film 3008 b has a major axis refractive index. ηχ ,, ny ,,

3QS57twf.ptd Page 13 200424672 V. Description of the invention (ίο) 4 nz, and nx, ny, and nz, satisfy the following formula nx, > ny, > nz ,, 4 > (nx -nz) / (nx ' ~ Ny ')> 2, and the main axis with a refractive index of nx' and the alignment direction of the LCD panel 3 〇 an angle (9 2, this angle 0 2 is, for example, between 20 degrees to 50 degrees Figure 6_ is a schematic diagram of the structure of a wide-view fast-response liquid crystal display device according to the third embodiment of the present invention, and Figure 7 is a schematic diagram of the axial direction of each optical and sheet in Figure 6 First, please refer to FIG. 6. The wide-viewing angle fast-response liquid crystal display 400 in this embodiment is mainly composed of a backlight source 402, an optical: m-pole element 404, a liquid crystal panel 406, and − Optical compensation circle inspection = the second structure is not described again and the arrangement of the components and the first ... ^ Polar structure: 4: See the example from Figure 6 Figure 7: 4 The optical compensation of this embodiment 4 0 4a and ^ 404: = of the liquid crystal panel 406 and a polarizer plate. Among them, the first dual optical axis m optical axis compensation film 404b is composed of M and nz, and each of the folding compensation films 404b has a principal axis refraction. The ratio μ satisfies the following formula nX > ny > nZ, for example, the orientation with the above-mentioned liquid crystal panel 4M, and the main axis degree 03 of the f emissivity nX is, for example, between 40 degrees and an angle of 03, which is the same. Please refer to Fig. 6 and the first two. Compensation of the light 4a and the first dual optical axis compensation of the circularly polarized member 4 〇4 (in this embodiment, a combination of the above optical 4 0 4b) The film analyzer 408a, a second single light 2 The circular analyzer 408 is, for example, a β optical beam composed of a double optical axis compensation film 40 8c-a wave plate 4 0 8 b and a second Example of absorption axis of tp I κ analyzer 4 0 8 a

200424672 V. Description of the invention (11) If the absorption axis of the polarizer 4 0 4 a is perpendicular to each other, and the orientation direction of the polarizer 4 0 4 a and the liquid crystal panel 4 0 6 is at an angle 0 4, this angle 0 4 is, for example, between 40 degrees and 75 degrees. The second single optical axis quarter wave plate 4 0 8 b is disposed between the analyzer 408 a and the liquid crystal panel 406, and the optical axis direction of the second single optical axis quarter wave plate 4 0 8 b and The direction of the absorption axis of the analyzer 4 0 8 a is, for example, 45 °. The second dual optical axis compensation film 4 0 c is disposed between the second single optical axis quarter wave plate 4 0 8 b and the liquid crystal panel 406, and the second dual optical axis compensation film 408 c 1J has a main vehicle composed of refractive indices nx ', ny', and nz ', and nx', ny ', and nz' satisfy the following formula 1 ^ '> 117' > 112 ', (11 乂' -112 ') / ( 11 乂 '-1 ^') > 6, and the principal axis whose principal axis refractive index is η x 'is, for example, perpendicular to the alignment direction of the liquid crystal panel 406. FIG. 8 is a schematic diagram showing the structure of a wide-view fast-response liquid crystal display according to a fourth embodiment of the present invention, and FIG. 9 is an axial schematic diagram of each optical film in FIG. 8. First, please refer to FIG. 8. The wide viewing angle fast response liquid crystal display 5 0 0 of this embodiment is mainly composed of a backlight 5 0 2, an optically compensated circular polarizing member 5 0 4, a liquid crystal panel 5 0 6 and an optical The compensation circle detection component is composed of 508, and the configuration of each component is the same as that of the first embodiment, so it will not be repeated here. Please refer to FIG. 8 and FIG. 9 at the same time. The optically-compensated circular polarizing member 5 0 of this embodiment is, for example, a cholesteric liquid crystal layer 5 0 4 a and a first double optical axis compensation film 5 0 4 b. The first dual optical axis compensation film 5 0 4 b is disposed between the cholesteric liquid crystal layer 50 4 a and the liquid crystal panel 506. The first dual optical axis compensation film 504 b has a major axis refractive index nx, ny, and nz. nx, ny, and nz satisfy the following formula nx > ny > nz, and the main axis with the main axis refractive index nx is perpendicular to the liquid crystal panel

ptd Page 15 200424672 V. Description of Invention (12)

506 orientation direction. Please refer to FIG. 8 and FIG. 9 as well. In this embodiment, the optical compensation of the above-mentioned optical = circular polarizing member 5 0 4 (a combination of the cholesterol liquid crystal layer 504a and the first dual optical axis compensation f 5 =) is used. The circular deflection 疒 is composed of 5 0 8 a,-a second single optical axis quarter wave plate 5 嶋, and a car H-axis compensation film 508C. The absorption of the polarizer 508a is, for example, an angle of 0 5 with the alignment direction of the liquid crystal panel 506, which is equal to 15 to 50 degrees. The second single optical axis quarter wave f 5 0 8 b is disposed between the analyzer 5 0 a and the liquid crystal panel 5 06 and the optical axis direction of the second == 2 quarter wave plate 5y_b For example, it is clamped 45 degrees with the direction of the analyzer 508a. The first dual optical axis compensation film 508 < is arranged in the second, between the axial quarter wave plate 508b and the liquid crystal panel 506, and the second dual film is composed of the repair film 508c The major axis having the major axis refractive indexes nx ′, ^ y, and η z, and the major axis refractive index η ′ ′ is perpendicular to the alignment direction of the liquid crystal panel 506. FIG. 10 is a schematic view showing the structure of a wide-view fast-response crystal display according to the fifth embodiment of the present invention, and FIG. 丨 丨 is a schematic view showing the axial direction of each light 7 film in FIG. First, please refer to FIG. 丨. The wide-angle fast-response liquid crystal display 600 of this embodiment is mainly composed of a backlight 602, a light and a two-pole repairing circular polarizing member 604, and a liquid crystal panel 600. And an optical compensation circle = a polarizing member 608, and the arrangement of each member is the same as that of the first embodiment, so it will not be repeated here. Please refer to FIG. 10 and FIG. 11 at the same time. Although the optical compensation circular surface member 6 0 4 of this embodiment is composed of a cholesteric liquid crystal layer 6 0 4 a and a first dual light compensation film 6 0 4 b. Among them, the first dual optical axis compensation film 6 〇 4 b configuration

No. 16 200424672 Description of the five inventions (13) The cholesterol liquid crystal layer 6 0 4a and the liquid crystal panel 6 0 6 compensation film 6 0 4b have a refractive index of the main axis ”, and the following formula: nx > ny > nz, and The main axis refracting base ^ nz and nx, ny, and nz satisfy the orientation direction of the plate 606. The main axes of nx are perpendicular to the liquid crystal plane. In the embodiment of the component 604, a combination of the above-mentioned optical axis compensation film 60can), a solid layer, a liquid Λ layer 60 ″, and the first double light are composed of an analyzer 6 0 8 3 and a : Light =, compensating for the correction member 608 in an example. Among them, the absorption of the analyzer 608 a = two, the compensation film 608b is sandwiched by an angle of 0 6, and this corner sound a 丨 liquid crystal Panel 6 06. The second dual optical axis compensation film 60% = between 15 degrees and 50 degrees, Ang Yi and the first axis compensation film 608b has the date and time iy, nz, and the main axis of refraction index nx, the main axis ^ axis of refraction index nx ,, is aligned with an angle _ Sheng Qiaoru and the liquid crystal panel 6 06 degrees. This angle 07 is for example between 20 degrees Up to 5 () Advantage of the above; Ming wide viewing angle liquid crystal display having the shell does not produce Jie

Angle at 1 does not use circularly polarized aurora for operation U 2! Ί: ΐ: Now asymmetric phenomenon. Effectively overcome vision 2 · The present invention uses a single film to compensate the angle of view, a quarter of the spleen is completed with a double light door, and the door is gray-scale inverted. 〇X first axis compensation film

Page 17 200424672 V. Description of the invention (14) Angle compensation 'will effectively improve the viewing angle uniformity and contrast of wide-viewing-angle LCDs, and avoid the problem of gray-scale inversion at large viewing angles. Although the present invention has been disclosed above with several preferred embodiments, 'but it is not intended to limit the present invention, anyone skilled in the art can make some changes and retouching without departing from the spirit and scope of the present invention'. The protection scope of the present invention shall be determined by the scope of the attached patent application.

5 years old 57twf.ptd Page 18 200424672 Brief description of the drawings The first diagram is a schematic diagram of the structure of a conventional wide viewing angle liquid crystal display; the second diagram is a schematic diagram of the structure of a wide viewing angle liquid crystal display according to the first embodiment of the present invention; The figure shows the axial schematic diagram of each optical film in Figure 2. Figure 4 shows the structure of the wide viewing angle liquid crystal display according to the second embodiment of the present invention, and Figure 5 shows the third embodiment according to the present invention. Embodiment A schematic view of the structure of a wide viewing angle liquid crystal display; FIG. 6 is a schematic axial view of each optical film in FIGS. 4 and 5; FIG. 7 is a wide viewing angle liquid crystal display according to a fourth embodiment of the present invention 8 is a schematic axial view of each optical film in FIG. 7; FIG. 9 is a schematic structural view of a wide viewing angle liquid crystal display according to a fifth embodiment of the present invention; FIG. 10 is a schematic view FIG. 9 is an axial schematic diagram of each optical film in FIG. 9; and FIG. 11 is an axial schematic diagram of each optical film in FIG. 10. [Illustration of Graphical Symbols] 1 0 0: Wide viewing angle liquid crystal display 1 0 2: Backlight 1 0 4: Linear polarizer 1 0 6, 1 1 ·· Compensation film 1 0 8: Optical self-compensating birefringent liquid crystal panel

: I? 0657twf. Ptd Page 19 200424672 Simple illustration of the diagram 1 1 2: Linear analyzer 2 0 0, 3 0 0, 4 0 0, 5 0 0, 6 0 0: Wide viewing angle LCD 2 0 2, 3 0 2, 4 0 2, 5 0 2, 6 0 2: Backlight 2 0 4, 3 0 4, 4 0 4, 5 0 4, 6 0 4: Optically compensated circular polarizing members 204a, 304a, 404a: Polarizers 204b, 304b: First single optical axis quarter wave plate 2 0 4c, 304c, 404b, 504b, 604b: First dual optical axis compensation film 2 0 6, 306, 406, 506, 606 ·· LCD panel 2 0 8, 3 0 8, 4 0 8, 5 0 8, 6 0 8: optical compensation circle analyzer 208a " 308a, 408a, 508a, 608a: analyzers 208b, 408b, 508b: second Single optical axis quarter-wave plate 208c, 308b, 408c, 508c, 608b: second dual optical axis compensation film 504a, 604a: cholesterol liquid crystal layer

^ i657twf.ptd page 20

Claims (1)

200424672 6. The scope of patent application 1. A wide viewing angle liquid crystal display, comprising: a backlight; an optically-compensated circular polarizing member disposed above the backlight; a liquid crystal panel disposed above the optically-compensated circular polarizing member; And an optical compensation circular analyzer, which is arranged above the liquid crystal panel. 2. The wide viewing angle liquid crystal display according to item 1 of the scope of patent application, wherein the liquid crystal panel is an optical self-compensating birefringent liquid crystal panel. 3. The wide viewing angle liquid crystal display according to item 1 of the scope of patent application, wherein the optically-compensated circular polarizing member includes: a polarizing plate; and a first dual optical axis compensation film disposed between the polarizing plate and the polarizing plate. Between LCD panels. 4. The wide viewing angle liquid crystal display according to item 3 of the scope of patent application, wherein the first dual optical axis compensation film has major axis refractive indices nx, ny, and nz, and nx, ny, and nz satisfy the following formula: , 4 > (nx-nz) / (nx-ny) > 2, and the main axis with a refractive index of nx is at an angle with the alignment direction of the LCD panel, and the angle is between 40 degrees and 75 degrees between. 5. The wide viewing angle liquid crystal display as described in item 3 of the scope of patent application, wherein the optical compensation circle analyzer includes: an analyzer, an absorption axis of the analyzer and an absorption axis of the polarizer are perpendicular to each other, The absorption axis direction of the polarizer is at an angle with the alignment direction of the liquid crystal panel, and the angle is between 40 degrees and 75 degrees; a second single optical axis quarter wave plate is disposed at the Analyzer and the liquid -^ 6657twf. Ptd Page 21 200424672 6. Between the patent application scope of the crystal panel, and a second dual light wave plate of the analyzer and the liquid crystal surface 6. If the application is dedicated to the second dual light nz ' , And ηχ ′, η (ηχ ′ -ηζ ′) / (ηχ ′ axis is perpendicular to the liquid crystal 7. If an application is made in which the optical compensation is a polarizer; in the second early light axis, one quarter of a skin The optical axis direction of the film is clamped by 45 degrees in the axial direction; and an axis compensation film is disposed between the second single optical axis quarter plate. The wide viewing angle liquid crystal display described in Item 5 of the scope of interest, the axis compensation film It has the principal axis refractive index η X ', ny', y, ^ nzf ^^ T ^ nx ^ ny ^ nz ',-ny') > 6 and the orientation direction of the main panel whose principal axis refractive index is nx '. The wide viewing angle liquid crystal display according to item 1 of the utility model, the circular polarizing member includes: a first single optical axis quarter wave plate disposed between the polarizing plate and the liquid crystal panel, wherein the first single The optical axis direction of the optical axis quarter wave plate is 45 degrees from the absorption axis direction of the polarizer; and a first double optical axis compensation film is disposed on the first single optical axis quarter plate. between. The wide-viewing angle liquid crystal display according to Item 7 of the favorable range, the axis compensation film has a main axis refractive index π X, ny, η z, and a wave plate and 8. wherein the η X 'ny system, and further toward 〇9. If the liquid crystal surface is applied for the first dual light, nz satisfies the following formula: nx > ny > nz, (nx-nz) / (nx-ny) > 6, the principal axis whose refractive index is ηχ is perpendicular to the alignment of the liquid crystal panel Fang Ru applied for the wide-angle LCD monitor of the wide-angle liquid crystal display as described in item 7 of the scope of special optical compensation, including: ΊΪ657 twf. Ptd Page 22 200424672 VI. Patent application scope An analyzer, the absorption axis of the analyzer and the absorption axis of the polarizer are perpendicular to each other, and the polarizer and the alignment direction of the liquid crystal panel are clamped An angle, and the angle is between 40 degrees and 75 degrees; and a second dual optical axis compensation film is disposed between the analyzer and the liquid crystal panel. 10. The wide viewing angle liquid crystal display according to item 9 of the scope of patent application, wherein the second dual optical axis compensation film has a major axis refractive index η X ', ny', nz ', and nx', ny '-nzy / ^ > ^ T ^ nx, > ny, > nz ,, 4 > (nx'-nz ') / (nx'-ny') > 2 limit, and the main axis with the refractive index nx 'and 20 degrees to 11, where the horn panel and the wave plate and the detector are mutually perpendicular, and η ζ τ is an angle between the alignment direction of the liquid crystal panel, and the angle is between 50 degrees. The wide viewing angle liquid crystal display according to item 7 of the scope of patent application, the optical compensation circle analyzer includes: an analyzer, the absorption axis of the analyzer is in phase with the absorption axis of the polarizer, and the polarizer An angle with the alignment direction of the liquid crystal panel is between 40 and 50 degrees; a second single-wavelength quarter-wave plate is disposed between the analyzer and the liquid, wherein the first The optical axis direction polarizers of the two single optical axis quarter wave plates are clamped by 45 degrees in the absorption axis direction; and the second dual optical axis compensation film is disposed on the second single optical axis quarter of the liquid crystal panel. between. The second dual optical axis compensation film in the wide viewing angle liquid crystal display according to item 11 of the scope of patent application has a main axis refractive index nx ', ny', and nx ', ny', nz 'satisfy the following formula nx' > ny '> nz', 'I6657twf.ptd Page 23 200424672 VI. Limitation of patent application scope (11 乂' -112 ') / (1 ^'-1 ^ ') > 6, and the principal axis whose refractive index is 11 means' is perpendicular to the Alignment direction of the LCD panel. 13. The wide viewing angle liquid crystal display according to item 1 of the scope of patent application, wherein the optically-compensated circular polarizing member includes: a cholesterol liquid crystal layer; and a first dual optical axis compensation film disposed between the cholesterol liquid crystal layer and Between the liquid crystal panels, the first dual optical axis compensation film has a major axis refractive index nx, ny, and nz, and nx, ny, and nz satisfy the following formula nx > ny > nz, and a major axis of refractive index η x is perpendicular to the major axis In the alignment direction of the liquid crystal panel. 14 The wide viewing angle liquid crystal display according to item 13 of the scope of the patent application, wherein the optical compensation circle analyzer includes: an analyzer, an absorption axis of the analyzer and an absorption axis of the polarizer are perpendicular to each other And the polarizer is at an angle with the alignment direction of the liquid crystal panel, and the angle is between 15 degrees and 50 degrees; a second single optical axis quarter wave plate is arranged at the inspection Between the polarizer and the liquid crystal panel, the optical axis direction of the second single optical axis quarter-wave plate and the absorption axis direction of the analyzer are clamped by 45 degrees; and a second dual optical axis compensation film, Disposed between the second single optical axis quarter-wave plate and the liquid crystal panel, wherein the second dual optical axis compensation film has a main axis refractive index η X ′, ny ′, η ζ ′, and the main axis refractive index is The main axis of η X 'is perpendicular to the alignment direction of the liquid crystal panel. 1 5. The wide viewing angle liquid crystal display according to item 13 of the scope of the patent application, wherein the optical compensation circle analyzer includes: an analyzer; the absorption axis of the analyzer and the absorption axis of the polarizer; rb? 57twf.ptd Page 24 200424672 6. The scope of patent application is perpendicular to each other, and the polarizer and the alignment direction of the LCD panel are at an angle, and the angle is between 15 degrees and 50 degrees And a second dual-optical axis compensation film disposed between the analyzer and the liquid crystal panel, wherein the second dual-optical axis compensation film has a main axis refractive index η X ′, ny ′, η ζ ′, and the main axis The main axis of the refractive index η X ′ is at an angle with the alignment direction of the liquid crystal panel, and the angle is between 20 degrees and 50 degrees. :; It > 657twf.ptd Page 25